Lifehacker reader Jenny saw an older tip on tracking page views on Craigslist, but wanted a way to get the same stats-tracking on the site's free ads without having to have your own image-serving web space. She utilized a little HTML tweaking and the free stat-tracking, URL-shortening service bit.ly to pull it off. It's a pretty clever hack that even the bit.ly team seems cool with. Got another stat-tracking hack for Craigslist? Share it in the comments.